Cutting machine



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Oct. 25, 1938.

L. BROWN CUTTING MACHINE Filed Feb. 1, 1937 2 Sheets-Sheet 2 Patented Oct. 25, 1938 UNITED STATES PATENT This invention relates to a cutting machine and more particularly to a machine for operating on flanged metal objects.

One of the objects of my invention is to pro-' vide a machine for cutting metal blanks out'of flanged or like objects.

Another object of my invention is to provid a machine which can be adjusted to cut any size blank and which can accommodate flanged as well as flat metal objects.-

Other objects will become apparent as this description progresses. r

I have found that with the present day cutting machines it is only possible to operate upon flat metal surfaces and that flanged discs cannot be accommodated in the machine. 'Howeverwith my invention I provide a machine which can cut discs from either fiat or flanged metal objects and wherein the size of said out can be varie depending upon the will of the operator.

In the drawings- 1 Figure 1 is a longitudinal view partly in cross section showing my invention;

Figure 2 is a plan view partly in cross section taken on the lines 22 of Figure 1;

Figure 3 is an end elevational view taken on the line 3-3 of Figure 1;

Figure 4 is a view of a modified form of the support for the upper cutting disc;

Figure 5 is a plan View takenon the line 5- 5 of Figure 4;

Figure 6 is a view taken on line 6-6 of ure 5.

In the drawings there is shown a rectangularly shaped base indicated generally at l0, having two upright standards, I l and I2, at the opposite ends of said base. The base is provided with a flat portion I3 in which there is formed medially thereof a longitudinal recess l4 which extends approximately half the length of the machine. Underneath said recess I provide two downwardly extending flanges i3a and I3b which provide a longitudinal trackway l5'in which is adapted to be positioned the squared head i6 of the bolt I This bolt extends through said recess and is secured by a nut I8 to the supporting member [9 which supports the lower cutting disc presently to be described. I provide a pair of legs or supports 20 and 2| formed integrally with the base.

The upright standards H and I2 each comprise a pair of arms Ila and Nb, Ma and I2b which extend upwardly from the base and whichare so shaped that they bend inwardly towards the top to provide semicircular supports 22 and 23 in which are adapted to rest the opposite ends of Figthe annular shafts 24 and 25. Completing said semicircular supports are caps 26 and 2'! which fit over said shafts and which are secured to said standards, by bolts 28 and 29 In this manner the annular shafts are securely fastened against endwise and rotational movement in the stand ards." The opposite ends of said shafts 25a and 25a are fixedly secured in any suitable manner, in a block 82 which will presently be described.

The bolt H which is slidably secured in the base [0 passes through an opening l9a to secure the right angled cutting disc support l'fito the base. The support [9 can be movedlongitudinally on the'base when the nut 18 'isloosened and is prevented from movement when said" nut is tightened. The vertically extending section 1922' of the support has an annular bore I" in which is fitted the stem 3| of the cutting disc head 32 and which stem is secured in saidbore by a set screw 33. 'I'he'head has a transverse opening 34 with enlarged openings 35' and 36 at the oppositesides thereof, in which enlarged openings are secured tapered roller bearings 3'! and 38 and through which extends a shaft 39. On one end of said shaft is secured the cutting disc or knife 40 and on the other end is secured a suitable retaining nut 4|. To permit said cutting disc to be positioned other than parallel to said base, I provide a bevelled section 42 in the right angled support and another opening 43,- shown in dotted lines in Figure 1, which permits the'bolt I! to pass therethrough and to secure said right angled support with the beveled section adjacent said base.

Supported on the shaft 24 is a movable carria'ge indicated generally at 44 which comprises oFFlCEa an annular collar 45 fitting around said shaft.

- axis of said shaft. The collar is provided with a number of spaced threaded openings, 52, 53 and 54 each of which can receive the threaded stem 55 of the handle 56 so that if desired different leverages can be obtained. The collar. is provided at its lowenend with an extension 45min which thereis a bore 45b within which is supported byaset screw 51 the stem 58 of the head 59 to which is secured a cutting disc or knifeBO. The

cutting disc 69 is supported in ball races in exactly the same manner as the cutting disc'40. As will be understood with the bolts tightened against the shaft, the cutting disc can be rocked or pivoted about the axis of the shaft by operating the handle 56 and that if it is desired to move the cutting disc lengthwise on said shaft the bolts 50 and 51 are loosened and the entire carriage can be shifted lengthwise into any de sired position. As will be seen, the cutting discs 40 and 60 can be swung about the vertical axis of their supports.

Positioned approximately the center of the length of the machine, I provide an opening 6| which has a boss 62 and through which opening extends an annular shaft 63 having an enlarged annular section 63a and a squared section 63b at the top thereof. Surrounding said enlarged section is a sleeve 64 and between said sleeve and said shaft is a bushing 65. Fixedly mounted on the squared end of said shaft to rotate therewith is a supporting table Eli-which has an annular channel 61 within which is suitably supported a raceof ball bearings 68. The bearings riding on suitable washers 69 and 18. Extending from the squared section is a pin or projection II which is adapted to fit in a small opening in the metal pan 1! which is to be sheared.

Secured to the lower end of the shaft 63 as by a spline I4 is a worm gear 15 which is driven by a worm 16 supported on a shaft 11. The shaft extends outwardly of the machine and is driven by a motor 'IBthrough a chain of suitable reduction gears, indicatedgenerally at 19. The shaft 11 is supported at one end in a sleeve 88 extending from the base l0, and at the opposite end through an opening in the base of the casting as at 8|.

Fixedly supporting the opposite ends 24aand 25a of the two shafts 24 and 25 is the block 82 which has a vertical bore 83 threaded at the top as at 84. Within said bore is a spindle 85 threaded adjacent its upper portion as at 86 to engage the threads in the block. Secured to said spindle is a handle 81 for rotating said spindle. Fixedly secured to the lowerend of said spindle as at 88 is a collar 89 against which rests a race of ball bearings 90 similar to the ball bearings 68. The ball bearings are adapted to ride within the annular channel 9| of the rotatable clamping member 92 which is similar in construction to the supporting member 66. The clamping member 92 is secured to the spindle 85 by a threaded bolt 93 which engages the flange 94 of the clamping member. In this way the clamping member is free to rotate loosely about its vertical axis while the supporting table is free to rotate with the motor drivenshaft 63.

As will be understood when the motor 18 drives the shaft 11 through the reduction gears 19, the

shaft 65 will rotate, rotating with it the supporting table 66on'which is positioned the metal pan to be sheared. As said pan is rotating with the operator manually holding the handle 56 to maintain the knife :60 in cutting engagement, the cutting knives 40 and 60 will cut the disc out of said pan. To vary the size of the disc to be cut, the cutting knives can be positioned in any desired position by loosening the bolts 50 and 5| and bolt I1, and by sliding the knife supports on the shaft 24 and-onthechanne'l base In.

In Figures 4, 5 and 6, I show a modified form of construction, particularly for supporting the upper cutting knife. In this construction, I provide a base 95 similar to the-base l8 and an upshaft has an operating handle H8. seen, by operating the handle H the rack is right standard 96 to which is secured as at 91 a pair of spaced longitudinal rails 98 and 99. The opposite ends of said rails not shown being secured to an upright standard similar to standard 96. Adapted to slide longitudinally on said rails is a block I00 formed of two L-shaped sections llll and H12 secured together by bolts IBM. The sections when joined together provide a rectangular opening I80!) in which is fitted for vertical movement a rack ,l03 having teeth l83a. The sections are cut away as at I04 to provide a space I which will accommodate a pinion gear I06 which is fixedly mounted on a shaft I01 supported in said blocks as at I08 and H19. The As will be movedup or down as desired. Secured to the lower end of the rack in the same manner as shown in the previous figures is a cutting disc III, while secured to the lower support H2 is a cutting disc secured in the same manner as the cutting disc 48. Provided in the blocks I00 are two recesses H2 and H3 which are engaged by the rails 98 and 99 so that said block can be longitudinally moved on said rails to any desired position. 7

The supporting table can be operated in precisely the same manner as that shown in Figures 1 to 3, while the block 82 of the clamping member can be supported on said rails by recesses similar to recesses H2 and H3.

It is understood that various modifications and changes can be made ,WithOllt departing from the spirit and scope of my invention.

What I desire to secure by Letters Patent is:

1. In a cutting machine of the class described comprising a rotatable supporting member, means for rotating said supporting member, a vertically movable and longitudinally rotatable clamp, a lower longitudinally movable cutting knife, a longitudinal shaft, an upper cutting member positioned on said shaft for longitudinal movement thereon independent of the movement of said lower cutting knife and for rocking movement about said shaft.

2. In a cutting machine for cutting flanged objects comprising a support for positioning a flanged object thereon, means for rotating said support, a clamping member adapted to be positioned over said object, a lower cutting knife adapted to be mounted for longitudinal movement, a longitudinal shaft, an upper cutting knife adapted to be independently mounted on said shaft and adapted to be longitudinally movable independent of the lower cutting knife, means for transversely rocking said upper knife out of engagement with the lower knife to permit insertion of the flanged object, said last mentioned means permitting positioning of said knife in cutting position.

3. In a cutting machine comprising a table for positioning a flanged object thereon, a clamping member adapted to be positioned over said object to engage it in clamping position, means for rotating said table, a longitudinal support, a cutting knife adapted to be longitudinally slidable on said support, means including ahandle for rocking said knife transversely about said support to permit insertion of the flanged object, said means permitting for positioning of said knife in cutting position.

4. In a cutting machine comprising a support for positioning a flanged object thereon, a clamping member adapted to be positioned over said object to engage it in clamping position, means for rotating said support, a longitudinal member, an upper cutting knife, mounted on said longitudinal member, a lower cutting knife mounted independently of said upper cutting knife, means for transversely rocking said upper cutting knife aboutsaid longitudinal member out of engagement with the lower cutting knife to permit insertion of a flanged object, said means permitting positioning of said upper cutting knife in cutting position, and means for longitudinally varying the distance between said support and said knives.

5. In a cutting machine of the class describedcomprising a rotatable supporting member, means for rotating said supporting member, a vertically movable and longitudinally rotatable clamp, a lower cutting knife, a longitudinal shaft, an upper cutting knife mounted on said shaft independently of said lower cutting knife and means for transversely rocking said upper cutting knife about said shaft.

6. In a cutting machine of the class described comprising a rotatable supporting member, means for rotating said supporting member, a vertically movable and longitudinally rotatable clamp, a

lower cutting knife, a longitudinal shaft, an upper cutting knife mounted on said shaft independently of said lower cutting knife, a handle secured to said upper cutting knife for transverse] rocking said knife about said shaft.

' 7. In a cutting machine comprising a supporting table for positioning a flanged object thereon, a clamping member adapted to be positioned over said object to engage it in clamping position, an upper support for supporting an upper knife, an independently mounted lower support for supporting a lower cutting knife, a handle secured to said upper cutting knife for transversely'rocking said cutting knife about its support to permit insertion of the flanged object.

8. In a cutting machine for cutting flanged objects comprising a support for positioning a flanged object thereon, means for rotating said support, a clamping member adapted to be positioned over said object, upper and lower cutting knives each freely rotatable, a support for said lower knife, a support for said upper knife, said upper support being independent of said lower support, means for transversely rocking said upper knife out of cutting position, said knives being rotatably driven by the, rotation of said object.

LEOPOLD BROWN. 

